Ventilatory responses to temperature variation in the fresh water turtle, Mauremys caspica leprosa
Journal of Comparative Physiology B, ISSN: 0174-1578, Vol: 164, Issue: 5, Page: 390-395
1994
- 3Citations
- 15Captures
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Article Description
A study of lung gas exchange in the fresh water turtle Mauremys caspica leprosa at normal physiological body temperatures (15, 25 and 35 °C) was extended to extreme temperatures (5 and 40 °C) to determine whether the direct relationship between body temperature and ventilatory response found in many lung-breathing ectotherms including other chelonian species was maintained. From 5 to 35 °C the lung ventilation per unit of O uptake and CO removed declined with temperature. Consequently, lung CO partial pressure increased with temperature. Its value was maintained within narrow limits at each thermal constant, suggesting a suitable control throughout the complete ventilatory cycle. At 40 °C the ventilatory response showed the opposite trend. The ratios of ventilation to lung gas exchange increased compared to their values at 35 °C. The impact of this increased breathing-lowering the estimated mean alveolar CO partial pressure-was nevertheless less than expected due to an increase in calculated physiological dead space. This suggests that the relative hyperventilation in response to hyperthermia found in Mauremys caspica leprosa is related to evaporative heat loss. © 1994 Springer-Verlag.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0028093744&origin=inward; http://dx.doi.org/10.1007/bf00302555; http://link.springer.com/10.1007/BF00302555; http://link.springer.com/content/pdf/10.1007/BF00302555; http://link.springer.com/content/pdf/10.1007/BF00302555.pdf; http://link.springer.com/article/10.1007/BF00302555/fulltext.html; http://www.springerlink.com/index/10.1007/BF00302555; http://www.springerlink.com/index/pdf/10.1007/BF00302555; https://dx.doi.org/10.1007/bf00302555; https://link.springer.com/article/10.1007/BF00302555
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